65173 has 2 divisors, whose sum is σ = 65174. Its totient is φ = 65172.

The previous prime is 65171. The next prime is 65179. The reversal of 65173 is 37156.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33489 + 31684 = 183^2 + 178^2 .

It is a cyclic number.

It is not a de Polignac number, because 65173 - 2¹ = 65171 is a prime.

Together with 65171, it forms a pair of twin primes.

65173 is a lucky number.

It is a plaindrome in base 15.

It is a nialpdrome in base 4 and base 16.

It is a zygodrome in base 4.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (65171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32586 + 32587.

It is an arithmetic number, because the mean of its divisors is an integer number (32587).

2⁶⁵¹⁷³ is an apocalyptic number.

It is an amenable number.

65173 is a deficient number, since it is larger than the sum of its proper divisors (1).

65173 is an equidigital number, since it uses as much as digits as its factorization.

65173 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 630, while the sum is 22.

The square root of 65173 is about 255.2900311411. The cubic root of 65173 is about 40.2428970401.

The spelling of 65173 in words is "sixty-five thousand, one hundred seventy-three".